Slow Wave Phenomena in Photonic Crystals

Details Slow Wave Phenomena in Photonic Crystals Slow Wave Phenomena in Photonic Crystals

2009-10-07

arxiv.org/abs/0910.1220v4

Physics

Optics

Submitted to Laser & Photonics Reviews

Scientific paper

Slow light in photonic crystals and other periodic structures is associated with stationary points of the photonic dispersion relation, where the group velocity of light vanishes. We show that in certain cases, the vanishing group velocity is accompanied by the so-called frozen mode regime, when the incident light can be completely converted into the slow mode with huge diverging amplitude. The frozen mode regime is a qualitatively new wave phenomenon -- it does not reduce to any known electromagnetic resonance. Formally, the frozen mode regime is not a resonance, in a sense that it is not particularly sensitive to the size and shape of the photonic crystal. The frozen mode regime is more robust and powerful, compared to any known slow-wave resonance. It has much higher tolerance to absorption and structural imperfections.

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